Cardiac ultrasound for prevention: When an echo is useful and what it shows

Blood markers reveal a lot about cardiac risks — but they don't show how the heart itself is structured. An echocardiogram makes heart size, valve condition and pumping function visible. When this examination is useful in longevity diagnostics.

What an echocardiogram shows — and how it works

An echocardiogram (echo for short) uses ultrasound waves to visualise the heart in real time. The most common form is transthoracic echocardiography (TTE): a probe is placed on the chest and produces two-dimensional cross-sectional images as well as three-dimensional views of the heart. No radiation, no needles, no contrast agents — and yet one of the most informative methods for cardiac diagnostics.

An echo takes 20 to 45 minutes depending on the clinical question and is performed by cardiologists or specialised sonographers. It shows heart size, wall thickness of the heart muscle, wall motion, the condition of all four heart valves, ventricular filling, and pressure conditions in the heart chambers and pulmonary circulation.

The key parameters: ejection fraction, LVH and valves

The ejection fraction (EF) describes what proportion of blood is pumped out of the left ventricle with each heartbeat. Normal values are above 55 to 60 percent. A reduced EF indicates impaired systolic function and is a central criterion in heart failure diagnostics. Echocardiography also assesses diastolic function — how well the heart muscle relaxes — which is often the first thing affected in hypertensive heart disease.

Left ventricular hypertrophy (LVH) — thickening of the left heart wall in response to persistently elevated blood pressure — is a common incidental finding that is only partially detectable on an ECG. Valve defects such as aortic stenosis (narrowing) or mitral regurgitation (leaky valve) can already reach clinically relevant severity without causing symptoms. Echocardiography makes them quantifiable.

Who benefits most from a preventive echo

An echo is not a routine examination for every healthy adult without symptoms. It is useful in cases of a family history of cardiomyopathy (hereditary heart muscle disease), a known heart murmur whose cause has not yet been investigated, persistently elevated blood pressure without prior cardiac assessment, endurance athletes with high training volume, and unexplained shortness of breath or reduced performance.

Years of endurance training change the heart structurally — this is known as the athlete's heart. Most of these changes are physiological and beneficial. Rarely, however, pathological conditions such as hypertrophic cardiomyopathy can be hidden among them, which poses an elevated risk during physical exertion. For people with very high training volume who have never had cardiac imaging, a one-time echocardiographic baseline examination can be worthwhile.

Stress echocardiography: Testing the heart under exertion

Stress echocardiography combines physical exertion (bicycle ergometer) or pharmacological stimulation with simultaneous ultrasound imaging. It shows whether wall motion abnormalities occur under stress — a sign of coronary artery disease. This form is significantly more sensitive than a standard stress ECG and is used when coronary artery disease is suspected.

A stress echocardiogram is not part of general preventive screening, but for people with multiple cardiac risk factors — diabetes, hypertension, smoking, family history of coronary artery disease — it can provide important additional information before any symptoms arise.

What an echo cannot do — and what it complements

An echocardiogram shows heart structure and function at the time of the examination. It does not show deposits in the coronary arteries — for that, coronary CT calcium scoring or CT coronary angiography is more appropriate. It does not replace a long-term ECG when arrhythmias are suspected. In the context of a complete cardiovascular risk assessment, it is an important but not standalone component.

As an initial examination for asymptomatic adults without specific risk factors, cardiology societies do not recommend routine echo screening. Anyone wanting to weigh up findings and indications will find a conversation with a cardiologist the best basis for a decision.

Documenting cardiac diagnostics with the YUTHI app

In the YUTHI app you can log echo findings such as ejection fraction, LVH result or valve status and retrieve them directly at your next medical appointment. Together with blood pressure trends and other cardiac markers, this creates a structured cardiovascular picture you can track over time.

Sources

• Lang RM et al. Recommendations for cardiac chamber quantification by echocardiography in adults. Journal of the American Society of Echocardiography, 2015;28(1):1–39.
• McDonagh TA et al. 2021 ESC Guidelines for the diagnosis and treatment of acute and chronic heart failure. European Heart Journal, 2021;42(36):3599–3726.
• Zile MR, Brutsaert DL. New concepts in diastolic dysfunction and diastolic heart failure. Circulation, 2002;105(11):1387–1393.
• Pelliccia A et al. 2020 ESC Guidelines on sports cardiology and exercise in patients with cardiovascular disease. European Heart Journal, 2021;42(1):17–96.